In the end , the pcb design and implementation of olt and onu are submit 最后,給出了olt和onu的pcb設(shè)計與實現(xiàn)。
Onu optical network unit 光纖網(wǎng)路單體
Onu : optical network unit 光纖網(wǎng)絡(luò)單元
The passivated catalyst was tested or characterized by onu autothermal apparatus , xrd , dta and bet 對鈍化后的催化劑進(jìn)行了onu自熱測試和xrd 、 dta 、 bet等表征。
Two groups of onus report and grant in turn , as the network load changes , olt converts the way of granting every onu 然后根據(jù)運營商的實際需要,提出另一種基于服務(wù)等級協(xié)議( sla )的算法sb - dba 。
Only when olt receives the first few bits of the uplink burst of onu and achieves the bit synchronization can the onu signal be restored Olt必須在收到onu上行突發(fā)的前幾個比特內(nèi)實現(xiàn)比特同步,才能恢復(fù)onu的信號。
Since the transmission loss from each onu to the olt receiver is different , there will exist a wide dynamic range in the received uplink optical power 每個onu到olt接收機(jī)的傳輸損耗不同,因此所接收到的上行光功率將存在較大的動態(tài)范圍。
The dissertation includes technique background of gpon , protocol summary , function architectures of olt and onu , dba ( dynamic band allocation ) algorithm and so on 本文概括描述了gpon技術(shù)的背景、標(biāo)準(zhǔn)協(xié)議的概述、系統(tǒng)中olt和onu的功能結(jié)構(gòu)和動態(tài)帶寬分配算法。
Based on the comprehension of protocols of itu - t g . 984 and the analysis of many research results , we gives a solution of the architecture design for olt and onu in gpon system 在理解itu - tg . . 984系列協(xié)議的基礎(chǔ)上,以及結(jié)合目前國際國內(nèi)的研究成果,提出了gpon系統(tǒng)中olt 、 onu的結(jié)構(gòu)設(shè)計方案。
The epon network includes optical line terminal ( olt ) and optical network unit ( onu ) . onuses share the optical distribution network ( odn ) trunk fiber back to the central office Epon系統(tǒng)采用局端機(jī)( olt ) -用戶端機(jī)( olt )兩級結(jié)構(gòu),中間由無源光分配網(wǎng)絡(luò)完成下行光功率分配和上行光耦合。